CN113653759B - Active and passive vibration reduction supporting device for shafting transverse vibration transmission control - Google Patents
Active and passive vibration reduction supporting device for shafting transverse vibration transmission control Download PDFInfo
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- CN113653759B CN113653759B CN202110970383.5A CN202110970383A CN113653759B CN 113653759 B CN113653759 B CN 113653759B CN 202110970383 A CN202110970383 A CN 202110970383A CN 113653759 B CN113653759 B CN 113653759B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F6/00—Magnetic springs; Fluid magnetic springs, i.e. magnetic spring combined with a fluid
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/03—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using magnetic or electromagnetic means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2222/00—Special physical effects, e.g. nature of damping effects
- F16F2222/06—Magnetic or electromagnetic
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- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The invention provides an active and passive vibration damping supporting device for shafting transverse vibration transmission control, which comprises: the shaft body rotates to penetrate through a bearing seat, the bearing seat is installed on a base through a passive vibration isolator, the bearing seat is fixedly connected with two electromagnetic chucks at two horizontal ends respectively, the bearing seat is fixedly connected with one electromagnetic chuck at the lower end of the vertical direction, two horizontal electromagnetic bearings and two vertical electromagnetic bearings are fixedly installed on the base, the horizontal electromagnetic chucks are close to the horizontal electromagnetic bearings in alignment and installed, the vertical electromagnetic chucks are close to the vertical electromagnetic bearings in alignment and installed, and the vertical electromagnetic chucks are located between the two vertical electromagnetic bearings. The invention provides static supporting force for the bearing through the passive vibration isolator, provides transverse dynamic adjustment and control force through the active electromagnetic support, can actively adjust the horizontal and vertical positions of the shafting to ensure the shafting centering state, and can actively inhibit the transmission of the transverse excitation of the propeller to the ship body through the shaft and the base thereof.
Description
Technical Field
The invention relates to the technical field of ship vibration reduction and noise reduction, in particular to an active and passive vibration reduction supporting device for shafting transverse vibration transmission control.
Background
In the era of economic globalization, the utilization of ocean resources is more and more emphasized by countries in the world, and the advanced shipbuilding level is an important guarantee for developing the ocean resources. When sailing on the water surface, a ship is a large complex vibration noise source, and excessive vibration noise can cause great damage to the surrounding environment and human bodies, such as damage to a ship body structure, damage to the hearing of crew, pollution to the marine environment, influence on the growth and multiplication of fish resources, and the like.
The main causes of the vibration noise of the ship are the following three: firstly, when marine mechanical equipment such as a host, a gear box, a generator set, a propulsion shafting and the like works, vibration is transmitted to a hull structure through a base of the marine mechanical equipment, and the hull is induced to radiate noise underwater; the noise generated when the propeller rotates in the uneven wake field comprises rotation noise, turbulence noise, cavitation noise and the like; thirdly, when the ship sails on the water surface, the water flow passes through the surface of the ship body and the noise is generated by the interaction of turbulent pulsating pressure and the structure of the ship body. And when the ship sails at a low speed, the noise generated by the operation of mechanical equipment is the most main noise source.
In recent decades, the technologies of vibration isolation of the floating raft, blocking of vibration wave propagation by paving the mass block on the base, increase of vibration wave dissipation by paving the constrained damping layer and the like are applied, so that the transmission of the vibration of equipment such as a ship main engine, a gear box, a generator set and the like to a ship body is effectively inhibited. Through the schemes of a resonance converter, a distributed active vibration absorber, an electromagnetic active control device and the like, the longitudinal vibration of a propulsion shafting caused by the excitation force of a propeller is effectively controlled. On the basis, the problem of transverse vibration of the propulsion shafting begins to be highlighted. Therefore, the transverse vibration transmission of the propulsion shafting can be controlled, and the hull vibration and the sound radiation can be further reduced.
In chinese patent publication No. CN107605941B, a ship shafting elastic damping vibration attenuation support structure is disclosed, which is characterized in that: the device comprises a supporting bearing sleeved outside a propulsion shaft, wherein an elastic damping part is sleeved outside the supporting bearing, the elastic damping part comprises vulcanized rubber, a liquid-filled leather bag is arranged in the vulcanized rubber, the liquid-filled leather bag is provided with an oil filling hole, an installation shell is sleeved outside the vulcanized rubber, end covers are arranged at two ends of the vulcanized rubber, and the end covers are fixedly connected with the installation shell.
At present, researches on transverse vibration transmission control of a shafting are mainly focused on active electromagnetic vibration absorption, electromagnetic bearing vibration absorption and the like, but the methods cannot give consideration to broadband vibration absorption and low-frequency line spectrum control, and the existing vibration absorption measures need to be improved urgently.
Disclosure of Invention
In view of the defects in the prior art, the invention aims to provide an active and passive vibration damping supporting device for shafting transverse vibration transmission control.
The invention provides an active and passive vibration damping supporting device for shafting transverse vibration transmission control, which comprises: the electromagnetic vibration isolator comprises a shaft body, a bearing seat, a horizontal electromagnetic chuck, a horizontal electromagnetic support, a vertical electromagnetic chuck, a vertical electromagnetic support, a passive vibration isolator and a base;
The axle body rotates and wears to establish in the bearing frame, the bearing frame is installed on the base through passive isolator, the bearing frame is at two electromagnetic chuck of horizontal both ends difference fixedly connected with, the bearing frame is at electromagnetic chuck of vertical lower extreme fixedly connected with, two horizontal electromagnetic bearing and two vertical electromagnetic bearing fixed mounting is on the base, horizontal electromagnetic chuck is close to the installation with horizontal electromagnetic bearing centering, vertical electromagnetic chuck is close to the installation with vertical electromagnetic bearing centering, just vertical electromagnetic chuck is located between two vertical electromagnetic bearing.
Preferably, a plurality of displacement sensors are arranged on the base and measure the relative displacement of the horizontal electromagnetic chuck, the vertical electromagnetic chuck and the base respectively.
Preferably, an acceleration sensor is mounted on the base and measures horizontal and vertical acceleration responses of the base.
Preferably, uniform air gaps are arranged between the horizontal electromagnetic bearing and the horizontal electromagnetic chuck and between the vertical electromagnetic bearing and the vertical electromagnetic chuck.
Preferably, the two horizontal electromagnetic bearings and the two horizontal electromagnetic chucks are installed in a centering mode, the centering point of installation and the center line of the shaft body are located at the same height, and the two vertical electromagnetic bearings and the vertical electromagnetic chucks are installed in a centering mode and installed under the shaft body in a centering mode.
Preferably, the horizontal electromagnetic bearing and the vertical electromagnetic bearing are driven in a differential mode.
Preferably, the electromagnetic bearing comprises a plurality of groups of electromagnetic coils, and the plurality of groups of electromagnetic coils are distributed in a central symmetry manner.
Preferably, the base is provided with a number of displacement sensors corresponding to the number of the electromagnetic coils, and the displacement sensors are correspondingly mounted on the base along the distribution of the electromagnetic coils.
Preferably, the electromagnetic bearing device further comprises a control system, and the control system is connected with the horizontal electromagnetic bearing, the vertical electromagnetic bearing, the displacement sensor and the acceleration sensor.
Preferably, the horizontal electromagnetic support and the vertical electromagnetic support both adopt non-contact electromagnetic actuators.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention provides a static supporting force for the bearing through the passive vibration isolator, provides a transverse dynamic adjusting and controlling force through the active electromagnetic support, can actively adjust the horizontal and vertical positions of the shafting to ensure the centering state of the shafting, and can actively inhibit the transmission of the transverse excitation of the propeller to the ship body through the shaft and the base thereof.
2. The invention aims at reducing the vibration noise of the ship body caused by the transverse excitation of the propeller through the shafting and has the advantages of both broadband vibration reduction and line spectrum control;
3. Compared with other active elements, the non-contact electromagnetic actuator has the advantages of high response speed, uniform thrust, stable motion, reliable work and the like, and can effectively inhibit the transmission of the transverse excitation of the propeller to the ship body through the bearing.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a schematic overall structure diagram of an active and passive vibration damping support device for shafting transverse vibration transmission control according to an embodiment of the present invention;
FIG. 2 is a front sectional view of an active and passive vibration damping support device for shafting transverse vibration transmission control according to an embodiment of the present invention;
FIG. 3 is a structural top view of the active and passive vibration damping support device for shafting lateral vibration transmission control according to the embodiment of the present invention;
FIG. 4 is a control schematic diagram of the active and passive vibration damping support device for shafting transverse vibration transmission control according to the embodiment of the present invention.
Description of the reference numerals:
vertical electromagnetic bearing 5 of shaft body 1
Horizontal electromagnetic chuck 4 base 8
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will aid those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any manner. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the concept of the invention. All falling within the scope of the invention.
The invention discloses an active and passive vibration reduction supporting device for shafting transverse vibration transmission control, which comprises a shaft body 1, a bearing seat 2, a horizontal electromagnetic chuck 4, a horizontal electromagnetic support 3, a vertical electromagnetic chuck 6, a vertical electromagnetic support 5, a passive vibration isolator 7 and a base 8. The shaft body 1 is rotatably arranged in the bearing seat 2 in a penetrating manner, two ends of the shaft body 1 on the bearing seat 2 are arranged on the base 8 through the passive vibration isolators 7, two ends of the passive vibration isolators 7 are connected with the bearing seat 2 and the base 8 through threads, and the passive vibration isolators 7 provide static supporting force for the bearing seat 2.
Two horizontal electromagnetic chucks 4 are fixedly connected to two horizontal ends of a bearing seat 2 through threads respectively, a vertical electromagnetic chuck 6 is fixedly connected to the vertical lower end of the bearing seat 2 through threads, two horizontal electromagnetic bearings 3 and two vertical electromagnetic bearings 5 are fixedly connected to a base 8 through threads, the two horizontal electromagnetic bearings 3 and the two horizontal electromagnetic chucks 4 are installed in a centering mode, and the centering point positions of installation and the center line of a shaft body 1 are located at the same height. The vertical electromagnetic chuck 6 and the two vertical electromagnetic bearings 5 are installed in a centering mode, the vertical electromagnetic chuck 6 is located between the two vertical electromagnetic bearings 5, and the vertical electromagnetic chuck is installed under the shaft body 1 in a centering mode. Uniform air gaps are arranged between the horizontal electromagnetic chuck 4 and the horizontal electromagnetic support 3 and between the vertical electromagnetic chuck 6 and the vertical electromagnetic support 5 so as to generate electromagnetic constraint force, and the size of the air gap is determined according to the required electromagnetic force.
The transverse electromagnetic bearing and the vertical electromagnetic bearing 5 both adopt non-contact electromagnetic actuators, compared with other active elements, the propeller transverse excitation control device has the advantages of high response speed, uniform thrust, stable motion, reliable work and the like, and can effectively inhibit the transmission of the propeller transverse excitation to a ship body through the bearing seat 2.
Install a plurality of displacement sensor on base 8, displacement sensor's quantity can be two in this embodiment, a relative displacement who is used for measuring horizontal electromagnetic chuck 4 and base 8, another relative displacement who is used for measuring vertical electromagnetic chuck 6 and base 8, horizontal electromagnetic bearing 3 and vertical electromagnetic bearing 5 respectively with differential mode work, real-time adjustment horizontal electromagnetic chuck 4 and vertical electromagnetic chuck 6's position. Two acceleration sensors are mounted on the base 8 for measuring the horizontal and vertical acceleration responses of the base 8, respectively. The device also comprises a control system, wherein the control system is connected with the horizontal electromagnetic bearing 3, the vertical electromagnetic bearing 5, the displacement sensor and the acceleration sensor, the acceleration sensor feeds back to the control system in real time, the control system generates a control signal and outputs the control signal to the corresponding power amplifier so as to drive the horizontal electromagnetic bearing 3 and the vertical electromagnetic bearing 5 to generate a control force, and the transverse vibration transmission of the shaft body 1 is controlled in real time. The real-time feedback control system of displacement sensor and acceleration sensor, control system adopt differential mode drive horizontal electromagnetic bearing 3 and vertical electromagnetic bearing 5 to reduce axle body 1 and pass through bearing frame 2 transmission vibration.
A set of electromagnetic coils is embedded in each horizontal electromagnetic bearing 3 and each vertical electromagnetic bearing 5, so that non-contact electromagnetic attraction force is generated on the horizontal electromagnetic chuck 4 or the vertical electromagnetic chuck 6. In practice, a plurality of groups of electromagnetic coils, such as four groups distributed in central symmetry, can be embedded in each of the horizontal electromagnetic bearing 3 and the vertical electromagnetic bearing 5 to adjust the position of the electromagnetic chuck in real time. The arrangement of the multiple groups of electromagnetic coils can enable the position adjustment of the electromagnetic chuck to be more accurate.
Similarly, if four sets of electromagnetic coils are embedded in each horizontal electromagnetic bearing 3 or vertical electromagnetic bearing 5, four displacement sensors are arranged near one horizontal electromagnetic chuck 4 to measure the relative displacement between the position of the horizontal electromagnetic chuck 4 corresponding to the electromagnetic coil and the base 8. Four displacement sensors are arranged near the vertical electromagnetic chuck 6 and used for respectively measuring the relative displacement between the position, corresponding to the electromagnetic coil, on the vertical electromagnetic chuck 6 and the base 8.
In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.
The foregoing description has described specific embodiments of the present invention. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (7)
1. An active and passive vibration damping support device for shafting transverse vibration transmission control, comprising: the device comprises a shaft body (1), a bearing seat (2), a horizontal electromagnetic chuck (4), a horizontal electromagnetic support (3), a vertical electromagnetic chuck (6), a vertical electromagnetic support (5), a passive vibration isolator (7) and a base (8);
the shaft body (1) is rotatably arranged in a bearing seat (2) in a penetrating mode, the bearing seat (2) is installed on a base (8) through a passive vibration isolator (7), horizontal electromagnetic chucks are respectively and fixedly connected to two horizontal ends of the bearing seat (2), a vertical electromagnetic chuck is fixedly connected to the lower vertical end of the bearing seat (2), two horizontal electromagnetic bearings (3) and two vertical electromagnetic bearings (5) are fixedly installed on the base (8), the horizontal electromagnetic chuck (4) and the horizontal electromagnetic bearings (3) are aligned and closely installed, the vertical electromagnetic chucks (6) and the vertical electromagnetic bearings (5) are aligned and closely installed, and the vertical electromagnetic chucks (6) are located between the two vertical electromagnetic bearings (5);
The base (8) is provided with a plurality of displacement sensors which respectively measure the relative displacement of the horizontal electromagnetic chuck (4), the vertical electromagnetic chuck (6) and the base (8);
an acceleration sensor is arranged on the base (8), and the acceleration sensor measures the horizontal and vertical acceleration response of the base (8);
the horizontal electromagnetic bearing (3) and the vertical electromagnetic bearing (5) both adopt non-contact electromagnetic actuators.
2. The active and passive vibration damping supporting device for shafting transverse vibration transmission control as claimed in claim 1, wherein: uniform air gaps are arranged between the horizontal electromagnetic bearing (3) and the horizontal electromagnetic chuck (4) and between the vertical electromagnetic bearing (5) and the vertical electromagnetic chuck (6).
3. The active and passive vibration damping supporting device for shafting transverse vibration transmission control as claimed in claim 1, wherein: the two horizontal electromagnetic bearings (3) and the two horizontal electromagnetic suckers (4) are installed in a centering mode, the centering point positions of installation and the center line of the shaft body (1) are located at the same height, the two vertical electromagnetic bearings (5) and the vertical electromagnetic suckers (6) are installed in a centering mode, and the vertical electromagnetic suckers are installed under the shaft body (1) in a centering mode.
4. The active and passive vibration damping supporting device for shafting transverse vibration transmission control as claimed in claim 1, wherein: the horizontal electromagnetic bearing (3) and the vertical electromagnetic bearing (5) are driven in a differential mode.
5. The active and passive vibration damping supporting device for shafting transverse vibration transmission control as claimed in claim 1, wherein: the horizontal electromagnetic support and the vertical electromagnetic support comprise a plurality of groups of electromagnetic coils, and the plurality of groups of electromagnetic coils are distributed in a central symmetry mode.
6. The active and passive vibration damping support device for shafting transverse vibration transmission control as claimed in claim 5, wherein: the base (8) is provided with displacement sensors with the number corresponding to that of the electromagnetic coils, and the displacement sensors are correspondingly arranged on the base (8) along the distribution of the electromagnetic coils.
7. The active and passive vibration damping support device for shafting transverse vibration transmission control as claimed in claim 1, wherein: the device also comprises a control system, and the control system is connected with the horizontal electromagnetic support (3), the vertical electromagnetic support (5), the displacement sensor and the acceleration sensor.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110970383.5A CN113653759B (en) | 2021-08-23 | 2021-08-23 | Active and passive vibration reduction supporting device for shafting transverse vibration transmission control |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110970383.5A CN113653759B (en) | 2021-08-23 | 2021-08-23 | Active and passive vibration reduction supporting device for shafting transverse vibration transmission control |
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| CN113653759A CN113653759A (en) | 2021-11-16 |
| CN113653759B true CN113653759B (en) | 2022-06-28 |
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| CN114962538B (en) * | 2022-06-22 | 2023-06-09 | 招商局金陵船舶(江苏)有限公司 | Vibration reduction structure and vibration reduction method for roll-on-roll-off ship shafting |
| CN115325088A (en) * | 2022-07-26 | 2022-11-11 | 中国舰船研究设计中心 | Active vibration damper for intermediate bearing of long shafting of ship |
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| EP1915273A2 (en) * | 2005-06-30 | 2008-04-30 | Magnetar Technologies Corporation | Axial rotary eddy current brake with adjustable braking force |
| CN107165937B (en) * | 2017-04-21 | 2018-12-07 | 燕山大学 | A kind of transverse bearing of the dual bearing of electromagnetism-static pressure |
| CN110243604B (en) * | 2019-07-17 | 2020-10-30 | 大连工业大学 | Intermediary bearing vibration test device |
| CN111975690A (en) * | 2020-08-13 | 2020-11-24 | 苏州莱锦机电自动化有限公司 | Centering auxiliary device for electromechanical equipment installation |
| CN113153962B (en) * | 2021-04-20 | 2023-01-20 | 上海交通大学 | Electromagnetic vibration reduction thrust bearing for controlling longitudinal vibration of shafting |
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